US4629679A
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Tetrazole compound-containing photopolymerizable resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1986-02-25
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Granted: 1986-12-16
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Expires: 2006-02-25
Abstract
Abstract A photopolymerizable resin composition is described which comprises, (a) 40 to 85 wt. %, based on the composition, of a thermoplastic polymer binder, (b) 15 to 60 wt. %, based on the composition, of a cross-linkable monomer having at least one ethylenically unsaturation, (c) 0.5 to 10 wt. %, based on the total of the binder (a) and the monomer (b), of a photopolymerization initiator, and (d) 0.005 to 1 wt. %, based on the total of the binder (a) and the monomer (b), of a tetrazole compound of the formula: <IMAGE> wherein R1 is H, halogen, methyl, ethyl, phenyl, carboxyl, amino, dimethylamino, diethylamino, methoxy, ethoxy, mercapto or sulfonic acid; and R2 is H, methyl, ethyl, phenyl, amino or mercapto. The photopolymerization resin composition exhibits an enhanced adhesion to a metal surface, and is useful as a photoresist for fabrication of a printed circuit board.
Inventors
- 👤 Hiroyuki Uchida
- 👤 Jun Nakauchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:43
CPC Classifications
H; H05; H05K; H05K3/00; H05K3/0073; H05K3/0076; G; G03; G03F; G03F7/00; G03F7/004; G03F7/085; H05K2203/00; H05K2203/12; H05K2203/122; H05K2203/124; H05K3/02; H05K3/06; H05K3/061; H05K3/064; H05K3/38; H05K3/389; Y; Y10; Y10S; Y10S430/00; Y10S430/1053; Y10S430/1055; Y10S430/106; Y10S430/111; Y10S430/155
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
149 words
A photopolymerizable resin composition comprising (a) 40% to 85% by weight, based on the total weight of the photopolymerizable resin composition, of a thermoplastic polymer as a binder, (b) 25% to 50% by weight, based on the total weight of the photopolymerizable resin composition, of a cross-linkable monomer having at least one ethylenically unsaturated group in the molecule, (c) 0.5% to 10% by weight, based on the total weight of the thermoplastic polymer (a) and the cross-linkable monomer (b), of a photopolymerization initiator, and (d) 0.005% to 1% by weight, based on the total weight of the thermoplastic polymer (a) and the cross-linkable monomer (b), of a tetrazole compound represented by the formula: ##STR3## wherein R 1 is hydrogen, a halogen, or a methyl, ethyl, phenyl, carboxyl, amino, dimethylamino, diethylamino, methoxy, ethoxy, or sulfonic acid group; and R 2 is hydrogen or a methyl, ethyl, phenyl, or amino group.
Claim 2
Dependent Claim
149 words
A photopolymerizable resin composition comprising (a) 40% to 85% by weight, based on the total weight of the photopolymerizable resin composition, of a thermoplastic polymer as a binder, (b) 25% to 50% by weight, based on the total weight of the photopolymerizable resin composition, of a cross-linkable monomer having at least one ethylenically unsaturated group in the molecule, (c) 0.5% to 10% by weight, based on the total weight of the thermoplastic polymer (a) and the cross-linkable monomer (b), of a photopolymerization initiator, and (d) 0.005% to 1% by weight, based on the total weight of the thermoplastic polymer (a) and the cross-linkable monomer (b), of a tetrazole compound represented by the formula: ##STR3## wherein R 1 is hydrogen, a halogen, or a methyl, ethyl, phenyl, carboxyl, amino, dimethylamino, diethylamino, methoxy, ethoxy, or sulfonic acid group; and R 2 is hydrogen or a methyl, ethyl, phenyl, or amino group.
Claim 3
Dependent Claim
22 words
A photopolymerizable resin composition according to claim 1, wherein said thermoplastic polymer has a number average molecular weight of 20,000 to 200,000.
Claim 4
Dependent Claim
57 words
A photopolymerizable resin composition according to claim 1, wherein said thermoplastic polymer is selected from the group consisting of polymethyl methacrylate; a copolymer comprised of methyl methacrylate and an acrylic or methacrylic acid ester (other than methyl methacrylate) or styrene; and a copolymer comprised of an acrylic or methacrylic acid ester or styrene, and a carboxylic acid.
Claim 5
Dependent Claim
32 words
A photopolymerizable resin composition according to claim 1, wherein said cross-linkable monomer is selected from the group consisting of polyester acrylates, polyester methacrylates, epoxy acrylates, epoxy methacrylates, urethan acrylates, and urethane methacrylates.
Claim 6
Dependent Claim
32 words
A photopolymerizable resin composition according to claim 1, wherein said photopolymerizable initiator is selected from the group consisting of benzophenone, Michler's ketone, 4,4-bis(diethylamino)-benzophenone, t-butylanthraquinone, 2-ethylanthraquinone, thioxanthones, benzoin alkyl ethers and benzyl ketals.
Claim 7
Dependent Claim
33 words
A photopolymerizable resin composition according to claim 1, wherein said tetrazole compound is selected from the group consisting of 1-phenyltetrazole, 5-phenyltetrazole, 5-aminotetrazole, 5-amino-1-methyltetrazole, 5-amino-2-phenyltetrazole, 5-bromotetrazole, 5-hydroxytetrazole, 5-methoxytetrazole, 5-dimethylaminotetrazole, 5-tetrazolecarboxylic acid and 5-tetrazolesulfonic acid.
Claim 8
Dependent Claim
21 words
A photopolymerizable resin composition according to claim 1, wherein the amount of said tetrazole compound is 0.025% to 0.5% by weight.
Claim 9
Dependent Claim
14 words
A photopolymerizable resin composition according to claim 1, wherein the tetrazole compound is 5-aminotetrazole.
Claim 10
Dependent Claim
14 words
A photopolymerizable resin composition according to claim 1, wherein the tetrazole compound is 5-phenyltetrazole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |